Incandescent gas-burner.



0. MANNESMANN. NUANDESGENT GAS BURNER. APPLIGATION FILED MAnzs, 1905,

Patented Jan 17, 1911.

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TNTTED STATES TATENT @TTTQE OTTO MANNESMANN, OF REMSCHEID, GERMANY.

INCANDESCENT GAS-BURNER.

Application led March 23, 1905.

To all whom it may @officer/n:

Be it known that I, Orro HANNESMANN, natural philosopher7 a subject of the German Emperor, residing at Remscheid, Germany, have invented certain new and useful Improvements in Incandescent Gas-Burners; and I do hereby declare the following to be a full, clear, and exact description ofthe 1nvention, such as will enable others skilled 1n the art to which it appertains to make and use the same.

Up to date all incandescent burners provided with a kindling flame possess the disadvantage that the kindling flame may be extingushed by any air-draft on account of the fact that the pilot burner is arranged exteriorly and the kindling flame burns outside of the mixing tube. The present invention avoids this disadvantage by placing the kindling flame in the inside of the mixing' tube. I found in giving suitable sizes to the different parts of the burner the flame burns at the nozzle itself if the gas pressure is low and that as soon as the gas pressure is raised the flame is forced from the nozzle farther and farther until it reaches the incandescent mantel. As soon as the gas pressure is diminished the flame again recedes to the interior of the mixing tube and finally back to the gas nozzle. By the opening of the gas cock (valve) the pressure of the gas at the gas nozzle is increased from nearly 0 m/m successively up to the pressure of the gas in the gas conducting pipe and while closing the gas cock or valve the pressure of the gas at the gas nozzle sinks again progressively to O m/m or nearly 0 m/in.

I can use a separately fed kindling flame on a pilot burner introduced into the interior of the mixing tube for the purpose of igniting the main gas flow, or preferably, instead of conducting the gas to the kindling flame by a separate gas-tube I can use the main gas-tube and main gas nozzle for feeding the kindling flame. For this purpose I provide the gas cock or valve with a small opening in vertical or inclined or other suitable position to the main opening of the cock. This small opening gives outlet to a corresponding small amount of gas if the main opening is closed. The small opening may be provided with a regulating device of any suitable construction in order to regulate the kindling flame to the desired size. Or the main cock may be so constructed, that in a given position of the same, enough gas can Specification of Letters Patent.

Patented Jan. 1?, 1911.

Serial No. 251,704.

In many cases and especially when the i kindling flame is surrounded by tubes keeping off any outside draft, it is suflicient to use a kindling flame of so small a size, that it burns as a blue flame.

In order to diminish the danger of damaging the openings o f the nozzle by the kindling flame I may make the gas nozzle or that part of it that serves for the kindling flame from porcelain or any other material that is a bad conductor for heat.

Figures l, 2 and 3 of the accompanying drawing show the new burner for inverted light in two thirds of natural sizel in a vertical section, 0, is the main opening of the gas cock, Z) a small opening of the cock. J c the gas nozzle or pilot burner, `inthe l inlet for the mixing air, e the mixing tube,

e the end of the mixing tube or .burner head,

f the incandescent mantel, g the flame. In Fig. l the main opening cz of the gas cock is closed and only a minimal quantity of gas escapes through the small opening b of the gas cock.J The flame g is burning in close proximity to the gas nozzle c thus constituting a pilot burner. In F ig. 2 the main opening a of the gas cock is opened a little, so that a small amount of gas only can pass through; flame g burns now inside the mixing tube e only but at a point farther removed from the nozzle. In F ig. 3 where the gas cock is entirely opened the flame g is, by the gas pressure, still farther removed from the nozzle and burns outside of the mixing tube c, causing the incandescent mantel to produce light.

My new burner may be put into action and out of action from any point of the gas conducting pipe near to or distant from the burner or burners by placing at this point the gas cock or valve provided with means for reducing the gas pressure, during the time when the kindling flame only has to burn, to several millimeters and even down to a fraction of one millimeter water pressure, and provided. further with means for the passage of the larger quantity of gas during the time when the main llame for producing the incandescent light is intended to burn. It will be preferable to arrange the gas cock upon the side wall of the room in which the burner is mounted, next the door, whereby the advantages of electric light are secured with gas light. If the kindling flame burns at the gas nozzle itself the tube between the burner and the cock may be five meters or more without interfering with the efIicient operation of the invention. In case several burners Vare connected with said gas pipe the opening of the gas cock involves the igniting of all these burners. If it is desired that only a part of these burners shall be ignited by the opening of said gas cock or valve the remaining burners may b e closed by separate gas cocks.

The kindling flame placed in the interior of the mixing tube may be used advantageously in all kinds of heating burners, in which in any way more or less mixing air is added to the gas before its burning.

Instead of placing the gas nozzle in the interior of the mixing tube, it may be placed in close proximity to the mixing tube, z'. e. that part of the mixing tube which surrounds the nozzle and has the air inlets may be cut away so as to allow the mixing air to enter around the whole circumference.

I-Iaving thus fully described my invention, what I claim as new and desire to secure by Letters-Patent of the United States, is

l. In an incandescent burner, a mixing tube provided with an air inlet and open at its outer end, and a gas supply tube to feed gas to the mixing tube, said gas supply tube being provided with a burner nozzle of nonconducting material, for a pilot flame, and extending into the mixing chamber, in combination with a controlling gas cocl'in the gas-supply tube provided with a main opening for the gas supply to the mixing tube and a small opening for feeding the pilot iiame, the two openings being so arranged that when one is open the other is closed.

2. In an incandescent burner, a mixing tube provided with an air inlet near one end and open at its cuter end, and a gas supply tube to feed gas to the mixing tube, said gas supply tube being provided with a burner nozzle of non-conducting material, for feeding a pilot flame, extending into the mixing chamber in proximity to the air in'- let, in combination with a gas cock for controlling the supply of gas to the mixing chamber and provided with a by-pass for feeding the pilot iame.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

OTTO MANNESMANN.

Witnesses :r

WILLIAM KUEPPERS, Jol-I. SCHULZ. 

